Litter tray mat



FIG. 1 is a perspective view of a litter tray mat, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational view being an identical image thereof; and,

FIG. 4 is a left-side elevational view thereof, the right-side elevational view being an identical image thereof.

The bottom plan view forms no part of the claimed design.

The broken lines in FIG. 4 are for illustration only and form no part of the claimed design. 

CLAIM I claim the ornamental design for a litter tray mat, as shown and described. 